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1901 | serge | 1 | /* |
2 | * Mesa 3-D graphics library |
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3 | * Version: 7.7 |
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4 | * |
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5 | * Copyright (C) 2009 Chia-I Wu |
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6 | * |
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7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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8 | * copy of this software and associated documentation files (the "Software"), |
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9 | * to deal in the Software without restriction, including without limitation |
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10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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11 | * and/or sell copies of the Software, and to permit persons to whom the |
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12 | * Software is furnished to do so, subject to the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice shall be included |
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15 | * in all copies or substantial portions of the Software. |
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16 | * |
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17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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23 | * DEALINGS IN THE SOFTWARE. |
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24 | */ |
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25 | |||
26 | |||
27 | /** |
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28 | * \file remap.c |
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29 | * Remap table management. |
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30 | * |
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31 | * Entries in the dispatch table are either static or dynamic. The |
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32 | * dispatch table is shared by mesa core and glapi. When they are |
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33 | * built separately, it is possible that a static entry in mesa core |
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34 | * is dynamic, or assigned a different static offset, in glapi. The |
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35 | * remap table is in charge of mapping a static entry in mesa core to |
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36 | * a dynamic entry, or the corresponding static entry, in glapi. |
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37 | */ |
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38 | |||
39 | #include "mfeatures.h" |
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40 | |||
41 | #if FEATURE_remap_table |
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42 | |||
43 | #include "remap.h" |
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44 | #include "imports.h" |
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45 | #include "glapi/glapi.h" |
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46 | |||
47 | #define MAX_ENTRY_POINTS 16 |
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48 | |||
49 | #define need_MESA_remap_table |
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50 | #include "main/remap_helper.h" |
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51 | |||
52 | |||
53 | /* this is global for quick access */ |
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54 | int driDispatchRemapTable[driDispatchRemapTable_size]; |
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55 | |||
56 | |||
57 | /** |
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58 | * Return the spec string associated with the given function index. |
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59 | * The index is available from including remap_helper.h. |
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60 | * |
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61 | * \param func_index an opaque function index. |
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62 | * |
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63 | * \return the spec string associated with the function index, or NULL. |
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64 | */ |
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65 | const char * |
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66 | _mesa_get_function_spec(GLint func_index) |
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67 | { |
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68 | if (func_index < Elements(_mesa_function_pool)) |
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69 | return _mesa_function_pool + func_index; |
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70 | else |
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71 | return NULL; |
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72 | } |
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73 | |||
74 | |||
75 | /** |
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76 | * Map a function by its spec. The function will be added to glapi, |
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77 | * and the dispatch offset will be returned. |
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78 | * |
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79 | * \param spec a '\0'-separated string array specifying a function. |
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80 | * It begins with the parameter signature of the function, |
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81 | * followed by the names of the entry points. An empty entry |
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82 | * point name terminates the array. |
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83 | * |
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84 | * \return the offset of the (re-)mapped function in the dispatch |
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85 | * table, or -1. |
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86 | */ |
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87 | GLint |
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88 | _mesa_map_function_spec(const char *spec) |
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89 | { |
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90 | const char *signature; |
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91 | const char *names[MAX_ENTRY_POINTS + 1]; |
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92 | GLint num_names = 0; |
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93 | |||
94 | if (!spec) |
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95 | return -1; |
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96 | |||
97 | signature = spec; |
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98 | spec += strlen(spec) + 1; |
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99 | |||
100 | /* spec is terminated by an empty string */ |
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101 | while (*spec) { |
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102 | names[num_names] = spec; |
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103 | num_names++; |
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104 | if (num_names >= MAX_ENTRY_POINTS) |
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105 | break; |
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106 | spec += strlen(spec) + 1; |
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107 | } |
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108 | if (!num_names) |
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109 | return -1; |
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110 | |||
111 | names[num_names] = NULL; |
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112 | |||
113 | /* add the entry points to the dispatch table */ |
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114 | return _glapi_add_dispatch(names, signature); |
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115 | } |
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116 | |||
117 | |||
118 | /** |
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119 | * Map an array of functions. This is a convenient function for |
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120 | * use with arrays available from including remap_helper.h. |
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121 | * |
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122 | * Note that the dispatch offsets of the functions are not returned. |
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123 | * If they are needed, _mesa_map_function_spec() should be used. |
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124 | * |
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125 | * \param func_array an array of function remaps. |
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126 | */ |
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127 | void |
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128 | _mesa_map_function_array(const struct gl_function_remap *func_array) |
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129 | { |
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130 | GLint i; |
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131 | |||
132 | if (!func_array) |
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133 | return; |
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134 | |||
135 | for (i = 0; func_array[i].func_index != -1; i++) { |
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136 | const char *spec; |
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137 | GLint offset; |
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138 | |||
139 | spec = _mesa_get_function_spec(func_array[i].func_index); |
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140 | if (!spec) { |
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141 | _mesa_problem(NULL, "invalid function index %d", |
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142 | func_array[i].func_index); |
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143 | continue; |
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144 | } |
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145 | |||
146 | offset = _mesa_map_function_spec(spec); |
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147 | /* error checks */ |
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148 | if (offset < 0) { |
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149 | const char *name = spec + strlen(spec) + 1; |
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150 | _mesa_warning(NULL, "failed to remap %s", name); |
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151 | } |
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152 | else if (func_array[i].dispatch_offset >= 0 && |
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153 | offset != func_array[i].dispatch_offset) { |
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154 | const char *name = spec + strlen(spec) + 1; |
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155 | _mesa_problem(NULL, "%s should be mapped to %d, not %d", |
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156 | name, func_array[i].dispatch_offset, offset); |
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157 | } |
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158 | } |
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159 | } |
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160 | |||
161 | |||
162 | /** |
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163 | * Map the functions which are already static. |
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164 | * |
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165 | * When a extension function are incorporated into the ABI, the |
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166 | * extension suffix is usually stripped. Mapping such functions |
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167 | * makes sure the alternative names are available. |
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168 | * |
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169 | * Note that functions mapped by _mesa_init_remap_table() are |
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170 | * excluded. |
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171 | */ |
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172 | void |
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173 | _mesa_map_static_functions(void) |
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174 | { |
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175 | /* Remap static functions which have alternative names and are in the ABI. |
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176 | * This is to be on the safe side. glapi should have defined those names. |
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177 | */ |
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178 | _mesa_map_function_array(MESA_alt_functions); |
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179 | } |
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180 | |||
181 | |||
182 | /** |
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183 | * Initialize the remap table. This is called in one_time_init(). |
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184 | * The remap table needs to be initialized before calling the |
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185 | * CALL/GET/SET macros defined in main/dispatch.h. |
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186 | */ |
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187 | static void |
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188 | _mesa_do_init_remap_table(const char *pool, |
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189 | int size, |
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190 | const struct gl_function_pool_remap *remap) |
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191 | { |
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192 | static GLboolean initialized = GL_FALSE; |
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193 | GLint i; |
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194 | |||
195 | if (initialized) |
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196 | return; |
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197 | initialized = GL_TRUE; |
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198 | |||
199 | /* initialize the remap table */ |
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200 | for (i = 0; i < size; i++) { |
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201 | GLint offset; |
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202 | const char *spec; |
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203 | |||
204 | /* sanity check */ |
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205 | ASSERT(i == remap[i].remap_index); |
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206 | spec = _mesa_function_pool + remap[i].pool_index; |
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207 | |||
208 | offset = _mesa_map_function_spec(spec); |
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209 | /* store the dispatch offset in the remap table */ |
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210 | driDispatchRemapTable[i] = offset; |
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211 | if (offset < 0) |
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212 | _mesa_warning(NULL, "failed to remap index %d", i); |
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213 | } |
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214 | } |
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215 | |||
216 | |||
217 | void |
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218 | _mesa_init_remap_table(void) |
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219 | { |
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220 | _mesa_do_init_remap_table(_mesa_function_pool, |
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221 | driDispatchRemapTable_size, |
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222 | MESA_remap_table_functions); |
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223 | } |
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224 | |||
225 | |||
226 | #endif /* FEATURE_remap_table */>>>> |